High-temperature Fischer-Tropsch HTFT

Fischer-Tropsch Technology FTS can be carried out in several different reactor types fixed bed, fluidized bed, or slurry phase and at different temperatures. The high-temperature Fischer-Tropsch (HTFT) synthesis runs at 320°C-350°C, at which temperatures typically all products are in the gas phase [22], HTFT is operated in fluidized-bed reactors, with iron catalysts. Selectivities correspond to chain-growth probabilities in the range of 0.70-0.75 and are ideal for gasoline production, but olefins and oxygenates are formed as well and are used as chemicals. 

Although not as widely used as a gas-sofid PBR, FBR remains as the only choice for processes such as FCC and high-temperature Fischer-Tropsch (HTFT) synthesis, both of which have key roles in the petroleum processing and petrochemical industries. FCC is a critical step in petroleum refining and involves catalytic breakdown of heavy gas oil molecules into... 

Table 18.4 The carbon number distribution of high-temperature Fischer—Tropsch (HTFT) and low-temperature Fischer—Tropsch (LTFT) products, excluding Ci—C2 hydrocarbons...

Iron-based high-temperature Fischer-Tropsch (Fe-HTFT)... 

After the Second World War a gas-to-liquids facility that employed an iron-based high-temperature Fischer-Tropsch (Fe-HTFT) process was constructed at Brownsville, Texas. The technology was developed by Hydrocarbon Research, Inc.,20 and the commercial facility was operated by the Carthage Hydrocol Company. The Hydrocol plant was in commercial operation during the period 1951-1957, and it was shut down mainly for economic reasons (the oil price was around US 2 per barrel at that time). 

Change occurred in high-temperature Fischer-Tropsch reactor technology. The circulating fluidized bed Sasol Synthol reactors were replaced by fixed fluidized bed Sasol Advanced Synthol (SAS) reactors.44 This did not meaningfully affect the Fe-HTFT syncrude composition, but it reduced the operating cost of HTFT synthesis. 

HPST. See turbine, high-pressure, steam HPT. See turbine, high-pressure HRI. See Hydrocarbon Research Institute HT. See temperature, hemispherical HTFT. See Fischer-Tropsch (FT) synthesis, high-temperature... 

Fischer-Tropsch (FT) processes can operate at either low-temperature (LTFT), 190-260 °C, or high-temperature (HTFT), 300-350 With iron catalysts, HTFT processes are used for the production of petroleum-compatible alkanes and low molecular weight alkenes, while low-temperature (LTFT) processes are typically used to generate longer-chain hydrocarbons that can be refined into diesel and waxes. ... 

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